Usotsuki na Tsugai by Hazuki Natsu

Summary

Plot: “I will hold you, until my smell permeates you” The omega Akari, whose heat period wouldn’t come, even after becoming an adult, being despised by the family and called “useless”. However, one day, an alpha (Shinji) appeared who wanted to be paired to someone like him. Shinji, who forced Akari to have a heat-like condition with a medicine, wants to fill up his desires inside many times. “No…something’s…coming…!” Akari’s body, which should have been immature, is awakened indecently by Shinji.